Vehicle seat

Abstract

A vehicle seat is provided with a seat cushion and a seat back. The seat back is provided with a resin frame at least a part of the rear surface side of which is exposed; a pad material disposed on the resin frame; a trim cover for covering the pad material; and a resin hook mounted to an end of the trim cover. The resin frame has a turned-back end formed by turning back outward in a U shape an end of the resin frame. The resin hook is engaged with the turned-back end. The resin hook has a protrusion at the portion thereof which is located within the turned-back end.

The invention claimed is: 
     
       1. A vehicle seat comprising:
 a seat cushion; and 
 a seat back, 
 the seat back comprising: 
 a resin frame having a rear surface which is at least partly exposed; 
 a pad material disposed on the resin frame; 
 a trim cover covering the pad material; and 
 a resin hook attached to an end of the trim cover, the resin hook having a first end portion and second end portion with a gap therebetween, 
 wherein 
 the resin frame has a turned-back end turned back outward in a U shape, 
 the resin hook is hooked to and in contact with a terminal end portion side of the turned-back end, 
 the first end portion of the resin hook is positioned within the turned-back end together with the end of the trim cover, 
 the second end portion of the resin hook is located outside the terminal end portion side of the turned-back end, 
 the first end portion of the resin hook has a protrusion located within the turned-back end and facing away from the gap between the first end portion and the second end portion of the resin hook, 
 the trim cover is in contact with the protrusion and covers the resin hook, 
 there is a gap between a portion of the trim cover covering the protrusion and an adjacent portion of the turned-back end, and 
 the gap is smaller than a sum of the thickness of the protrusion and the thickness of the trim cover. 
 
     
     
       2. The vehicle seat according to  claim 1 , wherein the protrusion has a triangular cross section. 
     
     
       3. The vehicle seat according to  claim 1 , wherein an opening side of a hollow portion of the turned-back end is oriented toward a rear side relative to the seat back. 
     
     
       4. The vehicle seat according to  claim 1 , wherein the trim cover is turned inward and the resin hook is secured, at an inside of an inward-turned portion of the trim cover, so that an opening side of a hollow portion of the resin hook is oriented toward a front side relative to the seat back. 
     
     
       5. The vehicle seat according to  claim 1 , wherein a terminal portion side of the first end portion of the resin hook is sewn to the end of the trim cover. 
     
     
       6. The vehicle seat according to  claim 1 , wherein the turned-back end has a clearance of 15 mm or more. 
     
     
       7. The vehicle seat according to  claim 1 , wherein the resin frame is made of CFRP. 
     
     
       8. The vehicle seat according to  claim 1 , wherein the gap is smaller than a sum of the thickness of the hook, the thickness of the protrusion, and the thickness of the trim cover. 
     
     
       9. A vehicle seat comprising:
 a seat cushion; and 
 a seat back, 
 the seat back comprising: 
 a resin frame having a rear surface which is at least partly exposed; 
 a pad material disposed on the resin frame; 
 a trim cover covering the pad material; and 
 a resin hook having an attachment end portion and a distal end portion with a gap therebetween, the attachment end portion being attached to an end of the trim cover, 
 wherein 
 the resin frame has a turned-back end turned back outward in a U shape, 
 the turned-back end includes a first portion extending from a rear side to a front side in a cross-sectional view, a second portion extending from the front side to the rear side in a cross-sectional view and terminating, and a third portion connecting the first portion and the second portion, 
 the first portion, the second portion and the third portion are in contact with the pad material, 
 the resin hook is hooked to and in contact with the second portion of the turned-back end, 
 the attachment end portion of the resin hook has a protrusion facing away from the gap between the attachment and portion and the distal end portion and toward the first portion of the turned-back end, the protrusion being located between the first portion and the second portion of the turned-back end, and the distal end portion being located on the opposite side of the protrusion with respect to the second portion, 
 the attachment end portion of the resin hook is positioned between the first portion and the second portion of the turned-back end together with the end of the trim cover, 
 the trim cover is in contact with the protrusion and covers the resin hook, 
 there is a gap between the first portion of the turned-back end and a portion of the trim cover covering the protrusion, and 
 the gap is smaller than a distance between the second portion and a point where the portion of the trim cover covering the protrusion is closest to the first portion. 
 
     
     
       10. The vehicle seat according to  claim 9 , wherein the gap is smaller than a distance from the second portion to a point where the protrusion is closest to the first portion. 
     
     
       11. The vehicle seat according to  claim 9 , wherein a terminal portion side of the attachment end portion of the resin hook is sewn to the end of the trim cover.